I second Houlet's recommendation of Notes in Spanish!
When I walk long distances I sometimes enjoy walking in silence, sometimes silently praying, sometimes signing, sometimes skipping to the Foo Fighters or Motown. Lately, Mozart's Exsultate Jubilate makes my heat soar! I also have downloaded Pray As You Go and Pray the Rosary, as well as some traditional hymns that I want to memorize. For me, music is prayer. It is also it a good way to drown out the world's distractions and be alone with God. It is a divine gift sand I am sure there will be time on the camino to let it move me. God is everywhere: In the silence; in The Ramones. A hymn I was learning yesterday sums it up for me: "From the blessed heart of Mary; From all saints the song ascends; From the church the strain reechoes, Unto Earth's remotest ends."
So, Pilgrimgirl, as Mr. James Brown might say: "The Camino .... 'it's your thing, do what you wanna do; (they can't tell you what) to (listen) to.'"
BTW, I'm leaving from St. Jean the same day as you. However, I have NOT sufficiently trained or packed. I will be the old lady behind you with maybe/maybe not the wires sticking out of her ears and Edwin Starr exhorting her feet to get moving; she only has "25 Miles" to go now and I can hear Roncesvalles calling my name!